ML20010E116
| ML20010E116 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 08/28/1981 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Hoffman D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| References | |
| TASK-08-02, TASK-8-2, TASK-RR LSO5-81-08-075, LSO5-81-8-75, NUDOCS 8109030111 | |
| Download: ML20010E116 (5) | |
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August 28, 1981
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M Docket t!o. 50-155
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Mr. David P. Hoffman
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i fluclear Licensing Adninistrator j
Consumers Power Company k
1945 W Parnall Road e
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Jackson,flichigan 49201
Dear Mr. Hoffman:
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SUBJECT:
SEP TOPIC VIII-2, DNSITE EMERGENCY POWER SYSTEMS - DIESEL GEflERATOR, SAFETY EVALUATION FOR BIG ROCK P0IriT 4
The enclosed staff safety evaluation is based on contractor docunents that have been nade available to you previously. This evaluation is the staff's position regarding design of your facility in the subject area. With regard to the referenced topic, the staff has conclu 'ad your facility meets current licensing criteria.
l Sincerely, i
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i' Dennis M. Crutchfield, Chief Operating Reactors Branch No. 5 l
Division of Licensing i
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Enclosure:
As stated cc w/ enclosure:
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Mr. David P. Hoffman o
cc Mr. Paul A. Perry, Secretary.
U. S. Environnental Protection Consumers Pcwer Coapany Agency 212 West Michigan Avenue Federal Activities Branch Jackson, Michigan 49201 Region V Office ATTN: EIS COORDINATOR Judd L. Bacon, Esquire 230 South Ocarborn Street Consumers Pcwer Coapany Chicago, Illinois 60604 212 West Michigan Avenue Jackson, Michigan 49201 Herbert Grossman, Esq., Chairman Atomic. Safety and Licensing Board Joseph Gallo, Esquire U. S. Nuclear Regulatory Commission Isham, Lincoln & Beale Washington, D. C.
20555 1120 Connecticut Avenue Room 325 Dr. Oscar H. Paris Washington, D. C.
20036 Atomic Safety and Licensing Board U. S. Nuclear Regulatory Commission Peter W. Steketee, Esquire Washington, D. C.
20555 505 Peoples Building Grand Rapids, Michigan 49503 Mr. Frederick J. Shon Atomic Safety and Licensing Roard Alan S. Rosenthal, Esq., Chairaan U. S. Nuclear Regulatory Coan..saion Atomic Safety & Licensing Appeal Board Washington, D. C.
20555 U. S Nuclear Regulatory Commission j
Washington, D. C.
20555 Big Rock Point Nuclear Pcwer Plant ATTN: Mr. C. J. Hartman Mr. John O'Neill, II Plant Superintendent Route 2, Box 44 Charlevoix, Michigan 49720 Maple City, Michigan 49664 Christa-Mari a Charlevoix Public Library Route 2, Box 108C 107 Clinton Street Charlevoix, Michigan 49720 l
Charlevoix, Michigan William J. Scanlon, Esquire Chai rman 2034 Pauline Boulevard County Board of Supervisors Ann Arbor, Michigan 48103 i
Charlevoix County Charlevoix, Michigan 49720 Resident Inspector Big Rock Point Plant Office of the Governor (2) c/o U.S. NRC Room 1 - Capitol Building RR #3, Box 600 l
Lansing, Michigan 48913 Charlevoix, Michigan 49720 Herbert Semmel Mr. Jim E. Mills Council for Christa Maria, et al.
Route 2, Box 108C Urban Law Institute Charlevoix, Michigan 49720 l
Antioch School of Law 263316th Street, NW Thocas S. Moore Washington, D. C.
20460 Atomic Safety & Licensing Appeal Beard U. S. Nuclear Regulatory Commission Washington, D. C.
205 i
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SYSTEMATIC EVALUATION PROGRAM TOPIC VIO-2
, BIG ROCK POINT TOPIC: VIII-2, ONSITE EMERGENCY POWER SYSTEMS - DIESEL GENERATOR I.
Introduction _
111csel generators, which provide emergency standby power for safe rear. tor shutdown in the event of total loss of offsite power, have experienced a significant number of failures.
The failures to date have been attributed to a variety of causes, including failure of the air startup, fuel oil, and combustion air systems.
In some instances, the malfunctions were due, to lockout. The information available to the control room operator to indicate the operational status of the diesel generator was imprecise and could lead to misinterpretation.
This was caused by the sharing of a single annunciator station by alarms that indicate conditions that render a diesel generator unable to respond to an automatic emergency start signal and alarms that only indicate a warning of abnormal, but no disabling, conditions. Another cause was the wording on an annunciator window which did not specifically say that the diesel generator was inoperable (i.e.,
unable at the time to respond to an automatic emergency start signal) when in fact it was inoperable for that purpose. The review included the reliability, protective interlocks, fuel oi t quality, and testing of diesel generators to assure that the diesel generator meets the avail-ability requirements for providing emergency standby power to the engineered safety features.
II.
Review Criteria The review criteria are presented for Section 8.3.1 in Table 8-1 of the Standard Review Plan.
III. Related Safety Topics and Interfaces The scope of review for this topic was limited to avoid duplication of effort since some aspects of the review were performed under related topics. Related topics and the subject matter are _ identified below.
Each of the related topic reports contain the acceptance criteria and review guidance for its subject matter.
III-12 Environmental Qualification VI-7.C.1 Independence of Onsite Power VIII-1.A Degraded Grid XVII Fuel Oil Quality Assurance There are no safety topics that are dependent in the present topic informa-tion for their completion.
. IV.
Review Guidelines The review guidelines are presented in Section 8.3.1 of the Standard Review Plan.
V.
Evaluation The concern with regard to annunciators was pursued as a generic issue.
The staff safety evaluation concluded that in order to provide the operator with accurate, complete and timely jnformation pertinent to the status of the dicsel generators, as required by IEEE Std. 279-1971, the following corrective actions are required:
1.
Disabling and non-disabling conditions, currently alarmed at a common annunciator station, should be separated and annunciated at separate annunciator points.
2.
The wording on the annunciator for disabling conditions should specifically state that the diesel generator is unavailable for an automatic emergency start.
By a letter dated May ll,1978, the licensee agreed to make suitable modifications to the annunciotors.
Also, as a result of the work done by the University of Dayton, a generic program for implementing most of the recommendations fcrre-liability enhancement that are contained in the University of Dayton report is being conducted by NRC.
This latter program will also determine the adequacy of the diesel generator testing program on a case-by-case basis and enforce any necessary changes.
The question of fuel oil quality was addressed on a generic basis in January 1980, by letters to all licensees.
The letters required that licensees include fuel oil in their Quality Assurance program.
The Quality Assurance program is addressed in Topic XVII.
Until comoletion of Topic XVII, the periodic testing of the diesels is considered to be an adequate interim method for assuring acceptable quality in the fuel oil stored on site.
Beyond these efforts, EG&G Report C652F, " Diesel Generators" presents a technical evaluation of the diesel generator protective interlocks and load capability at Big Rock Point against present licensing criteria.
The report notes that the protective trips are in agreement with current NRC guidelines.
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VI.
Conclusion 1
l The staff finds that the diesel generator protective interlocks are l
acceptable.
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